DOCSLIB.ORG

Altitude of the Potentiometric Surface in the Mississippi River Valley Alluvial Aquifer, Spring 2018

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Altitude of the Potentiometric Surface in the Mississippi River Valley Alluvial Aquifer, Spring 2018 University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Publications of the US Geological Survey US Geological Survey 2020 Altitude of the Potentiometric Surface in the Mississippi River Valley Alluvial Aquifer, Spring 2018 Virginia L. McGuire Ronald C. Seanor William H. Asquith Anna M. Nottmeier David C. Smith See next page for additional authors Follow this and additional works at: https://digitalcommons.unl.edu/usgspubs Part of the Geochemistry Commons, Geology Commons, Geomorphology Commons, Hydrology Commons, and the Other Earth Sciences Commons This Article is brought to you for free and open access by the US Geological Survey at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Publications of the US Geological Survey by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Authors Virginia L. McGuire, Ronald C. Seanor, William H. Asquith, Anna M. Nottmeier, David C. Smith, Roland W. Tollett, Wade H. Kress, and Kellan R. Strauch Water Availability and Use Science Program Altitude of the Potentiometric Surface in the Mississippi River Valley Alluvial Aquifer, Spring 2018 National Aeronautics and Space Administration (NASA) Earth Observatory images by Lauren Dauphin, using March 17, 2017, Moderate Resolution Imaging Spectroradiometer (MODIS) data from NASA Earth Observing System Data and Information System/Land, Atmosphere Near real-time Capability for EOS (EOSDIS/ LANCE) and Global Imagery Browse Services (GIBS) | Worldview. Pamphlet to accompany Scientific Investigations Map 3453 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior DAVID BERNHARDT, Secretary U.S. Geological Survey James F. Reilly II, Director U.S. Geological Survey, Reston, Virginia: 2020 For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment—visit https://www.usgs.gov or call 1–888–ASK–USGS. For an overview of USGS information products, including maps, imagery, and publications, visit https://store.usgs.gov/. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner. Suggested citation: McGuire, V.L., Seanor, R.C., Asquith, W.H., Nottmeier, A.M., Smith, D.C., Tollett, R.W., Kress, W.H., and Strauch, K.R., 2020, Altitude of the potentiometric surface in the Mississippi River Valley alluvial aquifer, spring 2018: U.S. Geological Survey Scientific Investigations Map 3453, 13 p., 5 sheets, https://doi.org/ 10.3133/ sim3453. Associated data for this publication: McGuire, V.L., Seanor, R.C., Asquith, W.H., Nottmeier, A.M., Smith, D.C., Tollett, R.W., Kress, W.H., and Strauch, K.R., 2020, Datasets used to map the potentiometric surface, Mississippi River Valley alluvial aquifer, spring 2018: U.S. Geological Survey data release, https://doi.org/10.5066/P992HD1R. ISSN 2329-132X (online) iii Acknowledgments This map is the culmination of efforts by personnel from the Arkansas Department of Health, Arkansas Geological Survey, Arkansas Natural Resources Commission, Illinois Department of Agriculture, Illinois State Water Survey, Louisiana Department of Natural Resources, Louisiana Department of Transportation and Development, Mississippi Department of Environmental Quality, Yazoo Mississippi Delta Joint Water Management District, Missouri Department of Natural Resources, U.S. Department of Agriculture–Natural Resources Conservation Service, U.S. Army Corps of Engineers, and the U.S. Geological Survey’s Central Midwest, Lower Mississippi-Gulf, Oklahoma-Texas, and Nebraska Water Science Centers, who collected, compiled, organized, analyzed, and verified the groundwater- and surface-water-altitude data. In addition to the authors, who were primarily responsible for ensuring that the information con- tained in this report is accurate and complete, the following individuals contributed substantially to the review of the water-level data and related potentiometric-surface map: • Mississippi Department of Environmental Quality: James Hoffmann, Kay Whittington, Sam Mabry, Madison Kymes, and Pat Phillips; • U.S. Department of Agriculture, Agricultural Research Service: James Robert (JR) Rigby; and • Yazoo Mississippi Delta Joint Water Management District: David Kelly. v Contents Acknowledgments ........................................................................................................................................iii Introduction.....................................................................................................................................................1 Study Area Description ���������������������������������������������������������������������������������������������������������������������������������3 Data and Methods �����������������������������������������������������������������������������������������������������������������������������������������3 Water-Level Data ����������������������������������������������������������������������������������������������������������������������������������3 Characterizing the 2018 Potentiometric-Surface Raster and Contours ......................................8 Potentiometric-Surface Map, Spring 2018 ................................................................................................9 Summary........................................................................................................................................................10 References Cited..........................................................................................................................................10 Figures 1. Map showing previous and current extent of the Mississippi River Valley alluvial aquifer and areas with insufficient groundwater-altitude data to map the potentiometric surface for spring 2018 ..............................................................................2 2. Map showing location of wells with groundwater-altitude values and streamgages with surface-water-altitude values used to create the potentiometric-surface map of the Mississippi River Valley alluvial aquifer, spring 2018, and the part of the measurement month for the selected water-level-altitude value ...........................................................................................................7 Tables 1. Total number of wells that were completed in the Mississippi River Valley alluvial aquifer and measured manually one or more times or continually from January through May 2018, and the subset of these wells whose groundwater-altitude data were used to generate the potentiometric-surface map for the Mississippi River Valley alluvial aquifer, spring 2018, by Mississippi Alluvial Plain region ......................................................................................................................5 2. Summary statistics for water-level measurement dates of water levels used in the spring 2018 potentiometric-surface map for wells that were completed in the Mississippi River Valley alluvial aquifer and measured manually one or more times or continually as part of groundwater monitoring networks from January through May 2018, by Mississippi Alluvial Plain region .........................................6 3. Total number of streamgages in the Mississippi Alluvial Plain with surface-water-altitude values for April 10, 2018, and number of surface-water-altitude values, generally for April 10, 2018, used to generate the potentiometric-surface map, spring 2018, for the Mississippi River Valley alluvial aquifer by Mississippi Alluvial Plain region ................................................................8 vi Conversion Factors U.S. customary units to International System of Units Multiply By To obtain Length foot (ft) 0.3048 meter (m) mile (mi) 1.609 kilometer (km) Area section (640 acres or 1 square mile) 259.0 square hectometer (hm2) square mile (mi2) 259.0 hectare (ha) square mile (mi2) 2.590 square kilometer (km2) Flow rate million gallons per day (Mgal/d) 0.04381 cubic meter per second (m3/s) Datum Horizontal coordinate information is referenced to the World Geodetic Survey of 1984 (WGS 84). Historical data collected and stored as North American Datum of 1927 (NAD 27) or the North American Datum of 1983 (NAD 83) have been converted to WGS 84 for use in this publication. Vertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD 88). Historical data collected and stored as National Geodetic Vertical Datum of 1929 (NGVD 29) have been converted to NAVD 88 for use in this publication. Altitude, as used in this report, refers to distance above the vertical datum. Abbreviations GIS geographic information system MAP Mississippi Alluvial Plain MRVA Mississippi River Valley alluvial RMSE root mean square error USGS U.S. Geological Survey Altitude of the Potentiometric Surface in the Mississippi River Valley Alluvial Aquifer, Spring 2018 By Virginia L. McGuire, Ronald C. Seanor, William H. Asquith, Anna M. Nottmeier, David C. Smith, Roland W. Tollett, Wade H. Kress, and Kellan R. Strauch Previously published potentiometric-surface maps for a Introduction large part of the MRVA aquifer include maps from water levels measured from 1953
Load more

Recommended publications
  • Temperature Variability in the Bay of Biscay During the Past 40 Years, from an in Situ Analysis and a 3D Global Simulation
    ARTICLE IN PRESS Continental Shelf Research 29 (2009) 1070–1087 Contents lists available at ScienceDirect Continental Shelf Research journal homepage: www.elsevier.com/locate/csr Temperature variability in the Bay of Biscay during the past 40 years, from an in situ analysis and a 3D global simulation S. Michel a,Ã, A.-M. Treguier b, F. Vandermeirsch a a Dynamiques de l’Environnement Coˆtier/Physique Hydrodynamique et Se´dimentaire, IFREMER, BP 70, 29280 Plouzane´, France b Laboratoire de Physique des Oce´ans, CNRS-IFREMER-IRD-UBO, BP 70, 29280 Plouzane´, France article info abstract Article history: A global in situ analysis and a global ocean simulation are used jointly to study interannual to decadal Received 21 June 2008 variability of temperature in the Bay of Biscay, from 1965 to 2003. A strong cooling is obtained at all Received in revised form depths until the mid-1970’s, followed by a sustained warming over 30 years. Strong interannual 21 November 2008 fluctuations are superimposed on this slow evolution. The fluctuations are intensified at the surface and Accepted 27 November 2008 are weakest at 500 m. A good agreement is found between the observed and simulated temperatures, Available online 6 February 2009 in terms of mean values, interannual variability and time correlations. Only the decadal trend is Keywords: significantly underestimated in the simulation. A comparison to satellite sea surface temperature (SST) Bay of Biscay data over the last 20 years is also presented. The first mode of interannual variability exhibits a quasi- Interannual temperature variability uniform structure and is related to the inverse winter North Atlantic Oscillation (NAO) index.
    [Show full text]
  • Major Geographic Regions and Popula on of the United States of America
    Major geographic regions and populaon of the United States of America Major geographic regions and populaon of the United States of America Lesson plan (Polish) Lesson plan (English) Major geographic regions and populaon of the United States of America Link to the lesson Before you start you should know that the United Stated is an economically developed country; that the United States is an immigrant country founded mainly by immigrants from Europe and slaves brought from Africa; that a region’s natural environment influences its economic development. You will learn to show the great regions on a map of the United States; to name the major population groups inhabiting the United States; to name the reasons for the decline of the Native American culture. Nagranie dostępne na portalu epodreczniki.pl Nagranie dźwiękowe abstraktu Major geographic regions of the United States of America The United States of America is the fourth largest country in the world, with a surface area of 9,526,5 thousand sq. km, and the third most populous one, with 322 million inhabitants in 2010. This vast country is made up of continental states that lie in the central part of the North American continent, between the 25th parallel north and the 49th parallel north. Two more states, Alaska in the northwest extremity of North America and Hawaii in the Pacific Ocean, are located outside the main part of the United States. One of the crucial features of the natural environment of the United States is the meridional layout of its major geographic regions, which differ in altitude above sea level and landscape.
    [Show full text]
  • Development and Evaluation of Bankfull Hydraulic Geometry Relationships for the Physiographic Regions of the United States
    University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln U.S. Department of Agriculture: Agricultural Publications from USDA-ARS / UNL Faculty Research Service, Lincoln, Nebraska 2015 DEVELOPMENT AND EVALUATION OF BANKFULL HYDRAULIC GEOMETRY RELATIONSHIPS FOR THE PHYSIOGRAPHIC REGIONS OF THE UNITED STATES Katrin Bieger Blackland Research and Extension Center, Texas A&M, [email protected] Hendrik Rathjens Earth, Atmospheric, and Planetary Sciences, Purdue University Peter M. Allen Department of Geology, Baylor University Jeffrey G. Arnold USDA-ARS Grassland, Soil and Water Research Laboratory, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/usdaarsfacpub Part of the Geology Commons, and the Geomorphology Commons Bieger, Katrin; Rathjens, Hendrik; Allen, Peter M.; and Arnold, Jeffrey G., "DEVELOPMENT AND EVALUATION OF BANKFULL HYDRAULIC GEOMETRY RELATIONSHIPS FOR THE PHYSIOGRAPHIC REGIONS OF THE UNITED STATES" (2015). Publications from USDA-ARS / UNL Faculty. 1515. https://digitalcommons.unl.edu/usdaarsfacpub/1515 This Article is brought to you for free and open access by the U.S. Department of Agriculture: Agricultural Research Service, Lincoln, Nebraska at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Publications from USDA-ARS / UNL Faculty by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION AMERICAN WATER RESOURCES ASSOCIATION DEVELOPMENT AND EVALUATION OF BANKFULL HYDRAULIC GEOMETRY RELATIONSHIPS FOR THE PHYSIOGRAPHIC REGIONS OF THE UNITED STATES1 Katrin Bieger, Hendrik Rathjens, Peter M. Allen, and Jeffrey G. Arnold2 ABSTRACT: Bankfull hydraulic geometry relationships are used to estimate channel dimensions for streamflow simulation models, which require channel geometry data as input parameters.
    [Show full text]
  • By Nevin M. Fenneman DEPARTMENT of GEOLOGY, UNIVERSITY of CINCINNATI Communicated by W
    GEOLOGY: N. M. FENNEMAN 17 PHYSIOGRAPHIC SUBDIVISION OF THE UNITED STATES By Nevin M. Fenneman DEPARTMENT OF GEOLOGY, UNIVERSITY OF CINCINNATI Communicated by W. M. Davis, November 24, 1916 Various attempts at subdivision of the United States into physio- graphic provinces have been made, beginning with- that of Powell.' The Association of American Geographers, recognizing the fundamental importance of this problem, appointed a committee in 1915 to prepare a suitable map of physiographic divisions. The committee consists of Messrs. M. R. Campbell and F. E. Matthes of the U. S. Geological Survey and Professors Eliot Blackwelder, D. W. Johnson, and Nevin M. Fenneman (chairman). The map herewith presented and the ac- companying table of divisions constitute the report of that committee. The same map on a larger scale (120 miles to the inch) will be found in Volume VI of the Annals of the Association of American Geographers, accompanying a paper by the writer on the Physiographic Divisions of the United States. In that paper are given the nature of the bound- ary lines and those characteristics of the several units which are believed to justify their recognition as such. Though the above-named com- mittee is not directly responsible for the statements there made, many of them represent the results of the committee's conferences. The paper as a whole is believed to represent fairly well the views of the committee, though in form the greater part of it is a revision of a former publication.2 The basis of division shown on this map, here reproduced, is physio- graphic or, as might be said in Europe, morphologic.
    [Show full text]
  • Aquifers of Arkansas Protection, Management, and Hydrologic and Water-Quality Characteristics of Arkansas’ Groundwater
    Arkansas Water Plan Update D. Todd Fugitt, RPG Geology Supervisor, ANRC Jim Battreal, RPG Senior Geologist, ANRC Aquifers of Arkansas Protection, Management, and Hydrologic and Water-Quality Characteristics of Arkansas’ Groundwater Timothy M. Kresse and Phil Hays USGS Arkansas Water Science Center Todd Fugitt, Arkansas Natural Resources Commission •Sustainable Yield – Development and use of ground water resources in a manner that can be maintained for an indefinite time without causing unacceptable environmental, economic, or social consequences. (Alley & Leake, USGS, 2004) Physiographic Regions of Arkansas Legend Fall Line c=J Coun~Boundaries Legend LJ County Boundaries • Crowleys Ridge --Fall line ~ Alluvial Aquifers - Nacatoch Sand Ozark Aquifer - Wilcox Aquifer - Sparta/ Memphis Aquifer s - Cockfield Aquifer 25 50 The Sixteen Aquifers of Arkansas ~\ ~--------------- - -) \ '--- ~ I - ,~ .r 1 I I \ INTERIOR HIGHLANDS i I ~ I I f I COASTAL PLAIN ri I .,if l_, ~6 Il _ _ _ _ _ _______ _si' l;'OO' EXPLANATION Undifferentiated formations Coastal Plain aquifer system, D Coastal Plain alluvial aquifers. [·;<:•.·.! Mississippi River Valley alluvial aquifer ~ ::::::.: ] Ouachita-Saline River alluvial aquifer f·:·<·:c/.'1 Red River alluvial aquifer Jackson Group confining unit Wilcox aquifer Cockfield aquifer Nacatoch aquifer -Sparta aquijer -Ozan aquifer -Cane River aquifer -Tokio aquifer -Carrizo aquifer -Trinity aquifer -Interior Highlands aquifer system, - D- Ozark aquifer - D Springfield Plateau aquifer - Western Interior Plains confining system - Arkansas River alluvial aquifer - Oua chita Mountains aquifer system 20 II! MILES Base from U S. Geological Survey d1g1tal data, HydrogeologiC data modified from Boswell. 1965. Hosman and others. 1$8; U01versal Transverse Mecator proJection, 15 North r---.-~-.-----L--~--------~ 20 40 Ill KILOMETERS Hosman.
    [Show full text]
  • USGS Geologic Investigations Series I-2720, Pamphlet
    A Tapestry of Time and Terrain Pamphlet to accompany Geologic Investigations Series I–2720 U.S. Department of the Interior U.S. Geological Survey This page left intentionally blank A Tapestry of Time and Terrain By José F. Vigil, Richard J. Pike, and David G. Howell Pamphlet to accompany Geologic Investigations Series I–2720 U.S. Department of the Interior Bruce Babbitt, Secretary U.S. Geological Survey Charles G. Groat, Director Any use of trade, product, or firm names in this publica- tion is for descriptive purposes only and does not imply endorsement by the U.S. Government. United States Government Printing Office: 2000 Reprinted with minor corrections: 2008 For additional copies please contact: USGS Information Services Box 25286 Denver, CO 80225 For more information about the USGS and its products: Telephone: 1–888–ASK–USGS World Wide Web: http://www.usgs.gov/ Text edited by Jane Ciener Layout and design by Stephen L. Scott Manuscript approved for publication, February 24, 2000 2 Introduction are given in Thelin and Pike (1991). Systematic descriptions of the terrain features shown on this tapestry, as well as the Through computer processing and enhancement, we have geology on which they developed, are available in Thornbury brought together two existing images of the lower 48 states of (1965), Hunt (1974), and other references on geomorphology, the United States (U.S.) into a single digital tapestry. Woven the science of surface processes and their resulting landscapes into the fabric of this new map are data from previous U.S. (Graf, 1987; Bloom, 1997; Easterbrook, 1998). Geological Survey (USGS) maps that depict the topography and geology of the United States in separate formats.
    [Show full text]
  • Linear Trend Analysis: Implications for a Structural Fracture System And
    University of Arkansas, Fayetteville ScholarWorks@UARK Theses and Dissertations 5-2016 Linear Trend Analysis: Implications for a Structural Fracture System and Applications of Subsurface Fluid Migration, Northwest Arkansas and Eastern Oklahoma Loren Labusch University of Arkansas, Fayetteville Follow this and additional works at: http://scholarworks.uark.edu/etd Part of the Geology Commons, Hydrology Commons, and the Tectonics and Structure Commons Recommended Citation Labusch, Loren, "Linear Trend Analysis: Implications for a Structural Fracture System and Applications of Subsurface Fluid Migration, Northwest Arkansas and Eastern Oklahoma" (2016). Theses and Dissertations. 1452. http://scholarworks.uark.edu/etd/1452 This Thesis is brought to you for free and open access by ScholarWorks@UARK. It has been accepted for inclusion in Theses and Dissertations by an authorized administrator of ScholarWorks@UARK. For more information, please contact [email protected], [email protected]. Linear Trend Analysis: Implications for a Structural Fracture System and Applications of Subsurface Fluid Migration, Northwest Arkansas and Eastern Oklahoma A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Geology by Loren Labusch University of Arkansas Bachelor of Science in Geology, 2010 May 2016 The University of Arkansas This thesis is approved for recommendation to the Graduate Council. __________________________________ Dr. Ralph K. Davis Thesis Director __________________________________ __________________________________ Dr. Gregory Dumond Dr. Doy L. Zachry Committee Member Committee Member Abstract Lineaments are mappable, simple or composite linear or curvilinear features of the Earth’s surface longer than one mile, which differ from the patterns of adjacent features and are presumed to reflect subsurface phenomenon such as faults and fractures.
    [Show full text]
  • DOCUMENT BESUBE SP 007 215 World Geography. a Guide for Teachers. Missouri State Dept. Ot Education, Jetterson City. EDRS Price
    DOCUMENT BESUBE ED 051 161 SP 007 215 TITLE World Geography. A Guide for Teachers. INSTITUTION Missouri State Dept. ot Education, Jetterson City. PUB DATE 68 NOTE 263p. EARS PRICE EDRS Price hF-$0.65 HC-$9.87 DESCRIPTORS *Curriculum Guides, *Geography, *Grade 10, *World Geography ABSTRACT Grades or ages: Grade 1U. SUBJECT MATTER: World geography, ORGANIZATION AND PHYSICAL APPEARANCE: The guide is divided into 16 units covering various aspects of geography. Each unit is in list form. The guide is offset printed and edition bound with a paper cover. OBJECTIVES AND ACTIVITIES: Each unit begins with a list of about five concepts to be taught. Suggested activities are then listed under each concept. Activities consist mainly of analysis of maps and discussion. Suggested times are indicated for each unit. INSTRUCTIONAL MATERIALS: A list of different types of maps and other materials needed for the course is included in an introductory section. In addition, each unit contains a list of references for teachers and students. The guide itself is illustrated with numerous charts and maps. STUDENT ASSESSMENT: No mention. (RT) WORLD GEOGRAPHY U S DEPARTMENT OFHEALTH. EDUCATION & WELFARE A Guide For Teachers OFFICE OF EDUCATION THiL', DOCUMENT HASBEEN REPRO DUCE!) EXACTLY AS R£CEVEDFROM THE PERSON CR ORGANIZATION ORIG ,`EATING IT POINTS Of VIEWOR ODIN IONS STATED DO NOTNECESSARIL REpRcsENT OFFICIAL OFFICLOF EDU CATION POSITION OR POLICY HUBERT WHEELER Commissioner o, Education TABLE OF CONTENTS STATE BOARD OF EDUCATION iii ADMINISTRATIVE ORGANIZATION FOR DEVELOPIN THE WORLD GEOGRAPHY GUIDE iv FOREWORD ACKNOWLEDGMENTS vi POINT OF VIEW 1 The "Why" of Geography at Secondary Level Structure of Geography 4 Objectives 16 Organizatio,, 18 Approach 18 Facilities and Equipment 20 Suggested Preparation of Teachers 22 INF;v1IUCTIONAL PROGRAM 24 UNIT I DISTRIBUTION AND CHARACTERISTICS OF WORLD POPULATION 25 UNIn' II THE EARTH'S RESOURCES IN RELATION TO WORLD POPULATION 43 UNIT IIIECONOMIC ACTIVITIES IN RELATION TO WORLD POPULATION .
    [Show full text]
  • Ohiolink ETD Center
    EXTENSION AND THE ADOPTION OF ENVIRONMENTAL TECHNOLOGIES IN THE PARISMINA WATERSHED, COSTA RICA A Thesis Presented in Partial Fulfillment of the Requirements for the Degree Master of Science in the Graduate School of The Ohio State University By Melanie Joy Miller, B.S ****** The Ohio State University 2007 Master's Examination Committee: Approved by: Dr. David Hansen, Advisor Dr. William Flinn Dr. Linda Lobao Rural Sociology Graduate Program Copyright by Melanie Miller 2007 ABSTRACT The diffusion of innovations model has been used by social scientists for decades to understand the adoption of new agricultural technologies, but its applicability to environmental as opposed to commercial technologies has been the source of much debate. The “classic” model’s ability to account for the diffusion of environmental innovations is hampered by its productivist and voluntarist assumptions. In addition, adoption patterns have been far more widely studied in North America than in areas such as Latin America. This thesis examines patterns of adoption of a set of environmental farm technologies in the Parismina Watershed in tropical Costa Rica, paying particular attention to the role of a local agronomic university’s extension activities in their dissemination. The findings indicate that overall patterns of adoption remain low; that size of farm is the strongest single predictor of adoption; and that a higher degree of environmental concern and contact with university extension also account for a significantly higher rate of adoption of environmental technologies. ii ACKNOWLEDGMENTS As with all major endeavors, this thesis has resulted from the efforts, ideas and personal support of many different people. I want to thank my advisor, Dr.
    [Show full text]
  • Development and Evaluation of Bankfull Hydraulic Geometry Relationships for the Physiographic Regions of the United States1
    JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION AMERICAN WATER RESOURCES ASSOCIATION DEVELOPMENT AND EVALUATION OF BANKFULL HYDRAULIC GEOMETRY RELATIONSHIPS FOR THE PHYSIOGRAPHIC REGIONS OF THE UNITED STATES1 Katrin Bieger, Hendrik Rathjens, Peter M. Allen, and Jeffrey G. Arnold2 ABSTRACT: Bankfull hydraulic geometry relationships are used to estimate channel dimensions for streamflow simulation models, which require channel geometry data as input parameters. Often, one nationwide curve is used across the entire United States (U.S.) (e.g., in Soil and Water Assessment Tool), even though studies have shown that the use of regional curves can improve the reliability of predictions considerably. In this study, regional regression equations predicting bankfull width, depth, and cross-sectional area as a function of drain- age area are developed for the Physiographic Divisions and Provinces of the U.S. and compared to a nationwide equation. Results show that the regional curves at division level are more reliable than the nationwide curve. Reliability of the curves depends largely on the number of observations per region and how well the sample represents the population. Regional regression equations at province level yield even better results than the division-level models, but because of small sample sizes, the development of meaningful regression models is not possible in some provinces. Results also show that drainage area is a less reliable predictor of bankfull channel dimensions than bankfull discharge. It is likely that the regional curves can be improved using multiple regres- sion models to incorporate additional explanatory variables. (KEY TERMS: streams; fluvial geomorphology; bankfull discharge; nationwide and regional regression equa- tions; hydrologic modeling.) Bieger, Katrin, Hendrik Rathjens, Peter M.
    [Show full text]
  • Plankton Disturbance at Suape Estuarine Area
    Transactions on Ecology and the Environment vol 27 © 1999 WIT Press, www.witpress.com, ISSN 1743-3541 Plankton disturbance at Suape estuarine area - Pernambuco - Brazil after a port complex implantation S. Neumann-Leitao, M. L. Koening, S. J. Macedo, C. Medeiros, K. Muniz and F. A. N. Feitosa Department of Oceanography of the Federal University of Pernambuco, Campus Universitdrio, 50.679-901, Recife, Pernambuco, Brazil Abstract The plankton structure was investigated at the estuary of the River Ipojuca after 1 0 years implantation of a Port Complex. Plankton was sampled in one fixed station. Concurrent hydrological, climatological and chlorophyll a data were taken. The course of the river alteration resulted into an estuary that tends to evolves from a classical towards a coastal lagoon type. Chlorophyll a presented low values for an estuarine mangrove area. Plankton high diversity (> 3.0 bits.ind"*) can be explained by the spatial heterogeneity, although a general biodiversity decrease was registered after port implantation. Phytoplankton presented 98 taxa outranking diatoms (72 species). Zooplankton presented 63 taxa outranking rotifers (29 species) and copepods (21 species). Less than 5% of these taxa were very frequent. Irregular fluctuations in plankton densities were observed with a sharp abundance decrease after port implantation. The community was dominated by marine eurihaline species with a high proportion of littoral taxa. Meroplanktonic larval recruitment was reduced by landing and dredging. The anthropic impacts affected the system balance. 1 Introduction A Port Complex was implanted in the south coast of Pernambuco State, Noth eastern Brazil in 1979/1980 as a solution to the State economy collapse.
    [Show full text]
  • Physiographic Regions Page 2 Of3
    Physi ographic Regi ons Page 1 of 3 ilUSGS A Tapestry of Time and Terrain: TAPESTh. "/lAIN PAGE The Union of Two Maps - Geology and Topography ( Physiographic NEW! Solve the Back to Boundaries Puzzle of Regions Regions Require 5 Thsh Plug-in An interpretati ve tool that can help make sense out of the 1arge am ount of information contained in this map is the regional classification shown here. Geomorphic, or physiographic, regions are broad-scal e subdivi si ons based on terrain texture, rock type, and geologi c structure and history. Nevin Fenneman's (1946) three-tiered classification of the United States - by division, province, and section - has provi ded an enduring spatial organizati on for the great vari ety of physic al features. The composite image presented here clearly shows the topographic textures and generalized geology (by age) from which the physical regions were synthesized. The features we describe represent many of thes e subdivi si ons. PHYSIOGRAPIDC REGIONS OF THE LO\VER 48 UNITED STATE S LAURENTIAN UPLAND INTERIOR lllG HLANDS 1. SuperiorUpland 14. Ozark Plateaus a. Springfield-Sal em pl ateaus ATLANTIC PLAIN b. Boston" Mountains" 1 S. Ouachita provinc e 2. Continental Shelf (not on map) a. Arkansas Valley htt :l/ta estr .us s. ovl h sio rl h sio.html 8/27/2009 Physiographic Regions Page 2 of3 3. Coastal Plain b. Ouachita Mountains a. Embayed section b. Sea Island section ROCKY MOUNTAIN SYSTEM c. Floridian section d. East Gulf Coastal Plain 16. Southern Rocky Mountains e. Mississippi Alluvial Plain 17. Wyoming Basin f.
    [Show full text]